Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and preparation method thereof

A nickel-cobalt-based alloy, precipitation strengthening technology, applied in the direction of manufacturing tools, furnace types, heat treatment equipment, etc., can solve the problems of alloy plasticity, reduced hot workability welding performance, low high temperature strength, weakened alloy oxidation resistance, etc., to achieve Increase the adjustment margin to avoid the effect of mechanical properties

Active Publication Date: 2021-03-26
CHINA HUANENG GRP CO LTD +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the three types of superalloys, traditional cobalt-based superalloys mainly rely on solid solution strengthening or carbide strengthening, and their high-temperature strength is low, so they are mainly used in environments with low mechanical loads.
However, the increase of Cr content will inevitably lead to the increase of α-Cr phase precipitation tendency in the alloy, making the material brittle; while the increase of Al content will reduce the plasticity, hot workability and welding performance of the alloy
At the same time, when the Ti content is high, the alloy is more likely to form TiO at high temperature, especially in the high temperature environment containing water vapor. 2 , which weakens the oxidation resistance of the alloy
This means that in the design of superalloys, improving the oxidation resistance of the alloy is contradictory to improving the mechanical properties of the alloy, and it is difficult to improve the oxidation resistance and mechanical properties of the alloy at the same time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and preparation method thereof
  • Precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and preparation method thereof
  • Precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance comprises the following steps:

[0029] (1) Alloy smelting: elements by mass fraction, 0.03≤C≤0.1%, 0<B≤0.003%, 14≤Cr≤17%, 25≤Co≤30%, 3≤W≤12%, 0.5≤ Nb≤2%, 2.5≤Al≤6%, 1≤Ti≤4%, 0≤Hf≤0.15%, 0≤Ta≤2%, the balance is Ni,

[0030] Among them, when 1.5≤Al / Ti≤3, 42 The formation of the promoted continuous Al 2 o 3 film formation.

[0031] According to the above-mentioned chemical composition ratio, the alloy raw material is put into a vacuum induction arc furnace, melted and refined to obtain an alloy ingot.

[0032] (2) Homogenization treatment: Homogenize the alloy ingot at 10-30° C. above the solid solution temperature of the γ′ phase for 24-72 hours, and then air-cool to room temperature.

[0033] (3) Rolling: the homogenized alloy ingot is rolled at a temperature of 30-50°C above the solid solution temperature of the γ′ phase;

[0034] (4) Heat treatment: h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and a preparation method thereof. The alloy comprises the following components in percentage by weight: 0.03% < = C < = 0.1% of C, 0 < B < = 0.003%, 14% < = Cr < = 17%, 25% < = Co < = 30%, 3%< = W < = 12%, 0.5% < = Nb < = 2%, 2.5% < = Al < = 6%, 1% < = Ti < = 4%, 0 < = Hf < = 0.15%, 0< =Ta< = 2% and the balance of Ni, wherein when 1.5< =Al / Ti<3, 4<Cr / Al< =6, and when 3< = Al / Ti < = 6, 2.5< = Cr / Al < = 4. When the Al content is certain, the Cr content is reduced through the Al / Ti ratio in the alloy, the alloy is promoted to spontaneously form an Al2O3 film with good protection performance, the technical problem that the Cr or Al content needs to be increased only for improving theoxidation resistance of the alloy is solved, and the adjustment margin of the content of other elements in the alloy is increased.

Description

technical field [0001] The invention relates to the field of nickel-cobalt-based alloys, in particular to a precipitation-strengthened nickel-cobalt-based alloy with high oxidation resistance and a preparation method thereof. Background technique [0002] Due to its excellent high-temperature strength, fatigue performance and good high-temperature oxidation / corrosion resistance, superalloys based on iron, cobalt, and nickel can work in high-temperature environments above 600°C for a long time. Among the three types of superalloys, traditional cobalt-based superalloys mainly rely on solid solution strengthening or carbide strengthening, and their high-temperature strength is low, so they are mainly used in environments with low mechanical loads. In contrast, nickel-based superalloys with γ′ (Ni 3 Al) phase strengthening is the main strengthening method, which has excellent mechanical properties, but the corrosion resistance of nickel-based superalloys is poor. In order to a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22F1/10C21D8/02C21D1/78C21D9/00C23C8/16C23F17/00
CPCC22C19/056C22C1/023C22F1/10C21D8/0226C21D8/0247C21D1/78C21D9/0081C23C8/16C23F17/00
Inventor 杨珍谷月峰袁勇鲁金涛严靖博杨征
Owner CHINA HUANENG GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com